185 



METHOD 1 



Oil olone 

 55% mortalit-y 



METHOD 2 

 USVo morfahty 550)jl 



■£ 30 

 fc 20 



10 



Oil and S yn peronic OSD 20 (concentrate) 



60% mortality 750 pi f oil 40% tnortality 



Oil gnciStiell Dispersant Concentrate 



30-, 



70% mortality 



750 pi roil 



45% mortality 



£ 30 



c 



fc20 

 Cl- 

 io 







Corexit 9527 (concentrate 

 % mortality 



750 pi r^ii 



60% mortality 



10 50 



Droplet size (pm) 



900 pi r oil 



900pl 



10 50 



Droplet size (pm) 



Figure 3. Crangon mortality, oU concentration and droplet size distributions of five oil/dispersant mixtures (mean 

 of four replicate tests). 



Method I - Oil and dispersant premixed before addition to test tanks. 

 Method 2 - Dispersant added to oil film before agitation. 



